/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserItemData.h
This key doesn't consider the data source, so should only be used for maps within a given data source. UseFContentBrowserItemKeyfor more general use where items may have come from different data sources.
class FContentBrowserItemDataKey
EContentBrowser...
ItemType
Flags denoting the item type information for an item instance.
FName
VirtualPath
The complete virtual path that uniquely identifies an item within its owner data source.